Method and device for scrambling sequence configuration, user equipment, and base station

ABSTRACT

A method and a device for scrambling sequence configuration, a user equipment and a base station are provided. The method includes: obtaining a search space and/or a transmission mode corresponding to an enhanced control channel; performing a scrambling initialization operation according to the search space and/or the transmission mode, and determining an initialization value of a scrambling sequence; determining the scrambling sequence according to the initialization value of the scrambling sequence; and scrambling a transmission signal transmitted by the enhanced control channel according to the scrambling sequence and then transmitting, so that a user equipment which receives the transmission signal performs a descrambling operation according to the scrambling sequence in the transmission signal. Randomization of interferences between different cells or terminals can be guaranteed as far as possible.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Application No.PCT/CN2012/083856, filed on Oct. 31, 2012, which is hereby incorporatedby reference in its entirety.

TECHNICAL FIELD

The present invention relates to communication technologies and, inparticular, to a method and a device for scrambling sequenceconfiguration, a user equipment, and a base station.

BACKGROUND

With the rapid development of communication technologies, more and moreusers use a mobile terminal. An existing control channel can only use atransmission mode of a distributed mode where only one user is supportedto perform information transmission at a same time-frequency resourceposition, which is far from meeting requirements. Hence, an enhancedphysical downlink control channel (ePDCCH) occurs.

Different from the conventional control channel which only supports thetransmission mode of the distributed mode, the enhanced control channelmay support the transmission mode of the distributed mode and atransmission mode of a localized mode, where the enhanced controlchannel which employs the transmission mode of the localized mode isable to support multiple users to perform information transmissionsimultaneously on a same time-frequency resource position, the capacityand performance requirements of the control channel are greatlysatisfied.

In order to distinguish between a user, a cell, a channel andinformation transmitted on the channel etc, a scrambling operation isperformed to to-be-transmitted information usually, that is, using ascrambling sequence to scramble the to-be-transmitted information andthen sending. Thus, the to-be-transmitted information needs to bescrambled when simultaneous transmission for multiple users at a sametime-frequency resource position is supported or when multipletransmission modes are used for information transmission, that is,performing an initialization configuration to a scrambling sequence soas to determine the scrambling sequence and applying the scramblingsequence to the to-be-transmitted information so as to distinguishbetween a user, a cell, a channel and/or information transmitted on thechannel, etc.

SUMMARY

Aspects of the present invention provide a method and a device forscrambling sequence configuration, a user equipment and a base station,which are used to determine a scrambling sequence so as to scrambletransmission information.

In a first aspect, the present invention provides a method forscrambling sequence configuration, including:

obtaining a search space and/or a transmission mode corresponding to anenhanced control channel, where the search space includes a UE-specificsearch space and a common search space, and the transmission modeincludes a localized mode and a distributed mode;

performing a scrambling initialization operation according to the searchspace and/or the transmission mode, and determining an initializationvalue of a scrambling sequence;

determining, according to the initialization value of the scramblingsequence, the scrambling sequence; and

scrambling, according to the scrambling sequence, a transmission signaltransmitted by the enhanced control channel and then transmitting, sothat a user equipment which receives the transmission signal performs adescrambling operation according to the scrambling sequence in thetransmission signal.

In a first possible implementation form according to the first aspect,the performing a scrambling initialization operation according to thesearch space and/or the transmission mode includes:

if the search space is the UE-specific search space, then performing aUE-specific scrambling initialization operation;

if the search space is the common search space, then performing atransmission point-specific scrambling initialization operation.

In a second possible implementation form according to the first possibleimplementation form, the determining an initialization value of ascrambling sequence includes:

determining, according to the UE-specific scrambling initializationoperation, the initialization value of the scrambling sequence asn_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

determining, according to the transmission point-specific scramblinginitialization operation, the initialization value of the scramblingsequence as └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID)^(cell) or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where, n_(RNTI) indicates an associated radio network temporaryidentifier RNTI when the enhanced control channel transmits information,n_(s) is a timeslot number, and N_(ID) ^(cell) is a physical cellidentity ID or a virtual cell ID of a cell where the user equipmentlocates.

In a third possible implementation form according to the first aspect,the performing a scrambling initialization operation according to thesearch space and/or the transmission mode includes:

if the search space is the UE-specific search space or the common searchspace, then performing a transmission point-specific initializationoperation.

In a fourth possible implementation form according to the third possibleimplementation form, the determining an initialization value of ascrambling sequence includes:

determining, according to the transmission point-specific scramblinginitialization operation, the initialization value of the scramblingsequence as └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID)^(cell) or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated radio network temporaryidentifier RNTI during enhanced control channel transmission, n_(s) is atimeslot number, and N_(ID) ^(cell) is a physical cell ID or a virtualcell ID of a cell where the user equipment locates.

In a fifth possible implementation form according to the first aspect,the performing a scrambling initialization operation according to thesearch space and/or the transmission mode includes:

if the transmission mode is the localized mode, then performing aUE-specific scrambling initialization operation;

if the transmission mode is the distributed mode, then performing atransmission point-specific scrambling initialization operation.

In a sixth possible implementation form according to the fifth possibleimplementation form, the determining an initialization value of ascrambling sequence includes:

determining, according to the UE-specific scrambling initializationoperation, the initialization value of the scrambling sequence asn_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

determining, according to the transmission point-specific scramblinginitialization operation, the initialization value of the scramblingsequence as └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID)^(cell) or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where, n_(RNTI) corresponds to an associated RNTI during enhancedcontrol channel transmission, n_(s) is a timeslot number, and N_(ID)^(cell) is a physical cell ID or a virtual cell ID of a cell where theuser equipment locates.

In a seventh possible implementation form according to the first aspect,the performing a scrambling initialization operation according to thesearch space and/or the transmission mode includes:

if the transmission mode is the localized mode or the distributed mode,then performing a UE-specific scrambling initialization operation; or

if the transmission mode is the localized mode or the distributed mode,then performing a transmission point-specific scrambling initializationoperation.

In an eighth possible implementation form according to the seventhpossible implementation form, the determining an initialization value ofa scrambling sequence includes:

determining, according to the UE-specific scrambling initializationoperation, the initialization value of the scrambling sequence asn_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

determining, according to the transmission point-specific scramblinginitialization operation, the initialization value of the scramblingsequence as └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID)^(cell) or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated RNTI during enhanced controlchannel transmission, n_(s) is a timeslot number, and N_(ID) ^(cell) isa physical cell ID or a virtual cell ID of a cell where the userequipment locates.

In a ninth possible implementation form according to the first aspect,the performing a scrambling initialization operation according to thesearch space and/or the transmission mode includes:

if the search space is the UE-specific search space and the transmissionmode is the localized mode, then performing a UE-specific scramblinginitialization operation;

if the search space is the UE-specific search space and the transmissionmode is the distributed mode, then performing a transmissionpoint-specific scrambling initialization operation.

In a tenth possible implementation form according to the ninth possibleimplementation form, the determining an initialization value of ascrambling sequence includes:

determining, according to the UE-specific scrambling initializationoperation, the initialization value of the scrambling sequence asn_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

determining, according to the transmission point-specific scramblinginitialization operation, the initialization value of the scramblingsequence as └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID)^(cell) or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated RNTI during enhanced controlchannel transmission, n_(s) is a timeslot number, and N_(ID) ^(cell) isa physical cell ID or a virtual cell ID of a cell where the userequipment locates.

In an eleventh possible implementation form according to the firstaspect, the performing a scrambling initialization operation accordingto the search space and/or the transmission mode includes:

if the search space is the common search space and the transmission modeis the localized mode, then performing a UE-specific scramblinginitialization operation;

if the search space is the common search space and the transmission modeis the distributed mode, then performing a transmission point-specificscrambling initialization operation.

In a twelfth possible implementation form according to the eleventhpossible implementation form, the determining an initialization value ofa scrambling sequence includes:

determining, according to the UE-specific scrambling initializationoperation, the initialization value of the scrambling sequence asn_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

determining, according to the transmission point-specific scramblinginitialization operation, the initialization value of the scramblingsequence as └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID)^(cell) or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated RNTI during enhanced controlchannel transmission, n_(s) is a timeslot number, and N_(ID) ^(cell) isa physical cell ID or a virtual cell ID of a cell where the userequipment locates.

In a thirteenth possible implementation form according to the secondpossible implementation form, or the fourth possible implementationform, or the sixth possible implementation form, or the eighth possibleimplementation form, or the tenth possible implementation form, or thetwelfth possible implementation form, the virtual cell ID is a virtualcell ID in initialization setting of a demodulation reference signalDMRS sequence of the enhanced control channel, or is a virtual cell IDin initialization setting of a DMRS sequence of a physical downlinkshared channel, or is other value which is configured by a higher layersignaling and is dedicated for the enhanced control channel.

In a fourteenth possible implementation form according to the firstaspect, or the first possible implementation form to the thirteenthpossible implementation form,

the transmission mode supported by the enhanced control channel in theUE-specific search space includes the localized mode and the distributedmode;

the transmission mode supported by the enhanced control channel in thecommon search space includes the localized mode and the distributedmode; or

the transmission mode supported by the enhanced control channel in thecommon search space includes the distributed mode.

In a second aspect, the present invention provides a method forscrambling sequence configuration, including:

when a user equipment receives a transmission signal sent by a basestation via an enhanced control channel, obtaining a search space and/ora transmission mode corresponding to the enhanced control channel, wherethe search space includes a UE-specific search space and a common searchspace, and the transmission mode includes a localized mode and adistributed mode;

performing a scrambling initialization operation according to the searchspace and/or the transmission mode, and determining an initializationvalue of a scrambling sequence;

determining the scrambling sequence according to the initializationvalue of the scrambling sequence; and

performing a descrambling operation to the transmission signal accordingto the scrambling sequence, and obtaining information in thetransmission signal.

In a first possible implementation form according to the second aspect,the performing a scrambling initialization operation according to thesearch space and/or the transmission mode includes:

if the search space is the UE-specific search space, then performing aUE-specific scrambling initialization operation;

if the search space is the common search space, then performing atransmission point-specific scrambling initialization operation.

In a second possible implementation form according to the first possibleimplementation form, the determining an initialization value of ascrambling sequence includes:

determining, according to the UE-specific scrambling initializationoperation, the initialization value of the scrambling sequence asn_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

determining, according to the transmission point-specific scramblinginitialization operation, the initialization value of the scramblingsequence as └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID)^(cell) or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) indicates an associated radio network temporaryidentifier RNTI when the enhanced control channel transmits information,n_(s) is a timeslot number, and N_(ID) ^(cell) is a physical cellidentity ID or a virtual cell ID of a cell where the user equipmentlocates.

In a third possible implementation form according to the second aspect,the performing a scrambling initialization operation according to thesearch space and/or the transmission mode includes:

if the search space is the UE-specific search space or the common searchspace, then performing a transmission point-specific initializationoperation.

In a fourth possible implementation form according to the third possibleimplementation form, the determining an initialization value of ascrambling sequence includes:

determining the initialization value of the scrambling sequence as└n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated radio network temporaryidentifier RNTI during enhanced control channel transmission, n_(s) is atimeslot number, and N_(ID) ^(cell) is a physical cell ID or a virtualcell ID of a cell where the user equipment locates.

In a fifth possible implementation form according to the second aspect,the performing a scrambling initialization operation according to thesearch space and/or the transmission mode includes:

if the transmission mode is the localized mode, then performing aUE-specific scrambling initialization operation;

if the transmission mode is the distributed mode, then performing atransmission point-specific scrambling initialization operation.

In a sixth possible implementation form according to the fifth possibleimplementation form, the determining an initialization value of ascrambling sequence includes:

determining, according to the UE-specific scrambling initializationoperation, the initialization value c_(init) of the scrambling sequenceas n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

determining, according to the transmission point-specific scramblinginitialization operation, the initialization value c_(init) of thescrambling sequence as └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated RNTI during enhanced controlchannel transmission, n_(s) is a timeslot number, and N_(ID) ^(cell) isa physical cell ID or a virtual cell ID of a cell where the userequipment locates.

In a seventh possible implementation form according to the secondaspect, the performing a scrambling initialization operation accordingto the search space and/or the transmission mode includes:

if the transmission mode is the localized mode or the distributed mode,then performing a UE-specific scrambling initialization operation; or

if the transmission mode is the localized mode or the distributed mode,then performing a transmission point-specific scrambling initializationoperation.

In an eighth possible implementation form according to the seventhpossible implementation form, the determining an initialization value ofa scrambling sequence includes:

determining, according to the UE-specific scrambling initializationoperation, the initialization value of the scrambling sequence asn_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

determining, according to the transmission point-specific scramblinginitialization operation, the initialization value of the scramblingsequence as └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID)^(cell) or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated RNTI during enhanced controlchannel transmission, n_(s) is a timeslot number, and N_(ID) ^(cell) isa physical cell ID or a virtual cell ID of a cell where the userequipment locates.

In a ninth possible implementation form according to the second aspect,the performing a scrambling initialization operation according to thesearch space and/or the transmission mode includes:

if the search space is the UE-specific search space and the transmissionmode is the localized mode, then performing a UE-specific scramblinginitialization operation;

if the search space is the UE-specific search space and the transmissionmode is the distributed mode, then performing a transmissionpoint-specific scrambling initialization operation.

In a tenth possible implementation form according to the ninth possibleimplementation form, the determining an initialization value of ascrambling sequence includes:

determining, according to the UE-specific scrambling initializationoperation, the initialization value c_(init) of the scrambling sequenceas n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

determining, according to the transmission point-specific scramblinginitialization operation, the initialization value c_(init) of thescrambling sequence as └n_(s)/2┘2⁹+N_(ID) ^(cell);n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated RNTI during enhanced controlchannel transmission, n_(s) is a timeslot number, and N_(ID) ^(cell) isa physical cell ID or a virtual cell ID of a cell where the userequipment locates.

In an eleventh possible implementation form according to the secondaspect, the performing a scrambling initialization operation accordingto the search space and/or the transmission mode includes:

if the search space is the common search space and the transmission modeis the localized mode, then performing a UE-specific scramblinginitialization operation;

if the search space is the common search space and the transmission modeis the distributed mode, then performing a transmission point-specificscrambling initialization operation.

In a twelfth possible implementation form according to the eleventhpossible implementation form, the determining an initialization value ofa scrambling sequence includes:

determining, according to the UE-specific scrambling initializationoperation, the initialization value of the scrambling sequence asn_(RNTI)·2¹⁴└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

determining, according to the transmission point-specific scramblinginitialization operation, the initialization value of the scramblingsequence as └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID)^(cell) or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated RNTI during the enhancedcontrol channel transmission, n_(s) is a timeslot number, and N_(ID)^(cell) is a physical cell ID or a virtual cell ID of a cell where theuser equipment locates.

In a thirteenth possible implementation form according to the secondpossible implementation form, or the fourth possible implementationform, or the sixth possible implementation form, or the eighth possibleimplementation form, or the tenth possible implementation form, or thetwelfth possible implementation form, the virtual cell ID is a virtualcell ID in initialization setting of a demodulation reference signalDMRS sequence of the enhanced control channel, or is a virtual cell IDin initialization setting of a DMRS sequence of a physical downlinkshared channel, or is other value which is configured by a higher layersignaling and is dedicated for the enhanced control channel.

In a fourteenth possible implementation form according to the firstaspect or the first possible implementation form to the thirteenthpossible implementation form,

the transmission mode supported by the enhanced control channel in theUE-specific search space includes the localized mode and the distributedmode;

the transmission mode supported by the enhanced control channel in thecommon search space includes the localized mode and the distributedmode; or

the transmission mode supported by the enhanced control channel in thecommon search space includes the distributed mode.

In a third aspect, the present invention provides a device forscrambling sequence configuration, including:

a first obtaining module, configured to obtain a search space and/or atransmission mode corresponding to an enhanced control channel, wherethe search space includes a UE-specific search space and a common searchspace, and the transmission mode includes a localized mode and adistributed mode;

a first determining module, configured to perform a scramblinginitialization operation according to the search space and/or thetransmission mode, and determine an initialization value of a scramblingsequence;

a second determining module, configured to determine the scramblingsequence according to the initialization value of the scramblingsequence; and

a transmitting module, configured to scramble, according to thescrambling sequence, a transmission signal transmitted by the enhancedcontrol channel and then transmit, so that a user equipment whichreceives the transmission signal performs a descrambling operationaccording to the scrambling sequence in the transmission signal.

In a first possible implementation form according to the third aspect,the first determining module is specifically configured to:

if the search space is the UE-specific search space, then perform aUE-specific scrambling initialization operation, and determine theinitialization value of the scrambling sequence;

if the search space is the common search space, then perform atransmission point-specific scrambling initialization operation, anddetermine the initialization value of the scrambling sequence.

In a second possible implementation form according to the first possibleimplementation form, the first determining module is specificallyconfigured to:

if the search space is the UE-specific search space, determine,according to the UE-specific scrambling initialization operation, theinitialization value of the scrambling sequence asn_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

if the search space is the common search space, determine, according tothe transmission point-specific scrambling initialization operation, theinitialization value of the scrambling sequence as └n_(s)/2┘2⁹+N_(ID)^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) indicates an associated radio network temporaryidentifier RNTI when the enhanced control channel transmits information,n_(s) is a timeslot number, and N_(ID) ^(cell) is a physical cellidentity ID or a virtual cell ID of a cell where the user equipmentlocates.

In a third possible implementation form according to the third aspect,the first determining module is specifically configured to:

if the search space is the UE-specific search space or the common searchspace, then perform a transmission point-specific initializationoperation, and determine the initialization value of the scramblingsequence.

In a fourth possible implementation form according to the third possibleimplementation form, the first determining module is specificallyconfigured to:

if the search space is the UE-specific search space or the common searchspace, then perform a transmission point-specific initializationoperation, and determine the initialization value c_(init) of thescrambling sequence as └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated radio network temporaryidentifier RNTI during the enhanced control channel transmission, n_(s)is a timeslot number, and N_(ID) ^(cell) is a physical cell ID or avirtual cell ID of a cell where the user equipment locates.

In a fifth possible implementation form according to the third aspect,the first determining module is specifically configured to:

if the transmission mode is the localized mode, then perform aUE-specific scrambling initialization operation, and determine theinitialization value of the scrambling sequence;

if the transmission mode is the distributed mode, then perform atransmission point-specific scrambling initialization operation, anddetermine the initialization value of the scrambling sequence.

In a sixth possible implementation form according to the fifth possibleimplementation form, the first determining module is specificallyconfigured to:

if the transmission mode is the localized mode, determine, according tothe UE-specific scrambling initialization operation, the initializationvalue c_(init) of the scrambling sequence asn_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

if the transmission mode is the distributed mode, determine, accordingto the transmission point-specific scrambling initialization operation,the initialization value c_(init) of the scrambling sequence as└n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated RNTI during enhanced controlchannel transmission, n_(s) is a timeslot number, and N_(ID) ^(cell) isa physical cell ID or a virtual cell ID of a cell where the userequipment locates.

In a seventh possible implementation form according to the third aspect,the first determining module is specifically configured to:

if the transmission mode is the localized mode or the distributed mode,then perform a UE-specific scrambling initialization operation, anddetermine the initialization value of the scrambling sequence; or

if the transmission mode is the localized mode or the distributed mode,then perform a transmission point-specific scrambling initializationoperation, and determine the initialization value of the scramblingsequence.

In an eighth possible implementation form according to the seventhpossible implementation form, the first determining module isspecifically configured to:

if the transmission mode is the localized mode or the distributed mode,determine, according to the UE-specific scrambling initializationoperation, the initialization value of the scrambling sequence asn_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

if the transmission mode is the localized mode or the distributed mode,determine, according to the transmission point-specific scramblinginitialization operation, the initialization value of the scramblingsequence as └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID)^(cell) or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated RNTI during enhanced controlchannel transmission, n_(s) is a timeslot number, and N_(ID) ^(cell) isa physical cell ID or a virtual cell ID of a cell where the userequipment locates.

In a ninth possible implementation form according to the third aspect,the first determining module is specifically configured to:

if the search space is the UE-specific search space and the transmissionmode is the localized mode, then perform a UE-specific scramblinginitialization operation;

if the search space is the UE-specific search space and the transmissionmode is the distributed mode, then perform a transmission point-specificscrambling initialization operation.

In a tenth possible implementation form according to the ninth possibleimplementation, the first determining module is specifically configuredto:

if the search space is the UE-specific search space and the transmissionmode is the localized mode, determine, according to the UE-specificscrambling initialization method, the initialization value c_(init) ofthe scrambling sequence as n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

if the search space is the UE-specific search space and the transmissionmode is the distributed mode, determine, according to the transmissionpoint-specific scrambling initialization operation, the initializationvalue c_(init) of the scrambling sequence as └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated RNTI during enhanced controlchannel transmission, n_(s) is a timeslot number, and N_(ID) ^(cell) isa physical cell ID or a virtual cell ID of a cell where the userequipment locates.

In an eleventh possible implementation form according to the thirdaspect, the first determining module is specifically configured to:

if the search space is the common search space and the transmission modeis the localized mode, then perform a UE-specific scramblinginitialization operation;

if the search space is the common search space and the transmission modeis the distributed mode, then perform a transmission point-specificscrambling initialization operation.

In a twelfth possible implementation form according to the eleventhpossible implementation form, the first determining module isspecifically configured to:

if the search space is the common search space and the transmission modeis the localized mode, determine, according to the UE-specificscrambling initialization operation, the initialization value c_(init)of the scrambling sequence as n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell)or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

if the search space is the common search space and the transmission modeis the distributed mode, determine, according to the transmissionpoint-specific scrambling initialization operation, the initializationvalue c_(init) of the scrambling sequence as └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated RNTI during enhanced controlchannel transmission, n_(s) is a timeslot number, and N_(ID) ^(cell) isa physical cell ID or a virtual cell ID of a cell where the userequipment locates.

In a fourth aspect, the present invention provides a user equipment,including:

a second obtaining module, configured to obtain a search space and/or atransmission mode corresponding to an enhanced control channel when theuser equipment receives a transmission signal transmitted by a basestation via the enhanced control channel, where the search spaceincludes a UE-specific search space and a common search space, and thetransmission mode includes a localized mode and a distributed mode;

a third determining module, configured to perform a scramblinginitialization operation according to the search space and/or thetransmission mode, and determine an initialization value of a scramblingsequence;

a fourth determining module, configured to determine the scramblingsequence according to the initialization value of the scramblingsequence; and

a descrambling module, configured to perform a descrambling operation toa scrambling sequence in the transmission signal according to thescrambling sequence.

In an eleventh possible implementation form according to the fourthaspect, the third determining module is specifically configured to:

if the search space is the UE-specific search space, then perform aUE-specific scrambling initialization operation, and determine theinitialization value of the scrambling sequence;

if the search space is the common search space, then perform atransmission point-specific scrambling initialization operation, anddetermine the initialization value of the scrambling sequence.

In a second possible implementation form according to the first possibleimplementation form, the third determining module is specificallyconfigured to:

if the search space is the UE-specific search space, determine,according to the UE-specific scrambling initialization operation, theinitialization value of the scrambling sequence asn_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(└n_(s)/2┘+1)·2¹⁶+n_(RNTI);

if the search space is the common search space, determine, according tothe transmission point-specific scrambling initialization operation, theinitialization value of the scrambling sequence as └n_(s)/2┘2⁹+N_(ID)^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) indicates an associated radio network temporaryidentifier RNTI when the enhanced control channel transmits information,n_(s) is a timeslot number, and N_(ID) ^(cell) is a physical cellidentity ID or a virtual cell ID of a cell where the user equipmentlocates.

In a third possible implementation form according to the fourth aspect,the third determining module is specifically configured to:

if the search space is the UE-specific search space or the common searchspace, then perform a transmission point-specific initializationoperation, and determine the initialization value of the scramblingsequence.

In a fourth possible implementation form according to the third possibleimplementation form, the third determining module is specificallyconfigured to:

if the search space is the UE-specific search space or the common searchspace, determine the initialization value c_(init) of the scramblingsequence as └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID)^(cell) or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated radio network temporaryidentifier RNTI during enhanced control channel transmission, n_(s) is atimeslot number, and N_(ID) ^(cell) is a physical cell ID or a virtualcell ID of a cell where the user equipment locates.

In a fifth possible implementation form according to the fourth aspect,the third determining module is specifically configured to:

if the transmission mode is the localized mode, then perform aUE-specific scrambling initialization operation, and determine theinitialization value of the scrambling sequence;

if the transmission mode is the distributed mode, then perform atransmission point-specific scrambling initialization operation, anddetermine the initialization value of the scrambling sequence.

In a sixth possible implementation form according to the fifth possibleimplementation form, the third determining module is specificallyconfigured to:

if the transmission mode is the localized mode, determine, according tothe UE-specific scrambling initialization operation, the initializationvalue of the scrambling sequence as n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID)^(cell) or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

if the transmission mode is the distributed mode, determine, accordingto the transmission point-specific scrambling initialization operation,the initialization value of the scrambling sequence as└n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated RNTI during enhanced controlchannel transmission, n_(s) is a timeslot number, and N_(ID) ^(cell) isa physical cell ID or a virtual cell ID of a cell where the userequipment locates.

In a seventh possible implementation form according to the fourthaspect, the third determining module is specifically configured to:

if the transmission mode is the localized mode or the distributed mode,then perform a UE-specific scrambling initialization operation, anddetermine the initialization value of the scrambling sequence; or

if the transmission mode is the localized mode or the distributed mode,then perform a transmission point-specific scrambling initializationoperation, and determine the initialization value of the scramblingsequence.

In an eighth possible implementation form according to the seventhpossible implementation form, the third determining module isspecifically configured to:

if the transmission mode is the localized mode or the distributed mode,determine, according to the UE-specific scrambling initializationoperation, the initialization value c_(init) of the scrambling sequenceas n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI); or

if the transmission mode is the localized mode or the distributed mode,determine, according to the transmission point-specific scramblinginitialization operation, the initialization value c_(init) of thescrambling sequence as └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI), corresponds to an associated RNTI during enhancedcontrol channel transmission, n_(s) is a timeslot number, and N_(ID)^(cell) is a physical cell ID or a virtual cell ID of a cell where theuser equipment locates.

In a ninth possible implementation form according to the fourth aspect,the third determining module is specifically configured to:

if the search space is the UE-specific search space and the transmissionmode is the localized mode, then perform a UE-specific scramblinginitialization operation;

if the search space is the UE-specific search space and the transmissionmode is the distributed mode, then perform a transmission point-specificscrambling initialization operation.

In a tenth possible implementation form according to the ninth possibleimplementation form, the third determining module is specificallyconfigured to:

if the search space is the UE-specific search space and the transmissionmode is the localized mode, determine, according to the UE-specificscrambling initialization operation, the initialization value c_(init)of the scrambling sequence as n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell)or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

if the search space is the UE-specific search space and the transmissionmode is the distributed mode, determine, according to the transmissionpoint-specific scrambling initialization operation, the initializationvalue c_(init) of the scrambling sequence as └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated RNTI during enhanced controlchannel transmission, n_(s) is a timeslot number, and N_(ID) ^(cell) isa physical cell ID or a virtual cell ID of a cell where the userequipment locates.

In an eleventh possible implementation form according to the fourthaspect, the third determining module is specifically configured to:

if the search space is the common search space and the transmission modeis the localized mode, then perform a UE-specific scramblinginitialization operation;

if the search space is the common search space and the transmission modeis the distributed mode, then perform a transmission point-specificscrambling initialization operation.

In a twelfth possible implementation form according to the eleventhpossible implementation form, the third determining module isspecifically configured to:

if the search space is the common search space and the transmission modeis the localized mode, determine, according to the UE-specificscrambling initialization operation, the initialization value c_(init)of the scrambling sequence as n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell)or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI);

if the search space is the common search space and the transmission modeis the distributed mode, determine, according to the transmissionpoint-specific scrambling initialization operation, the initializationvalue c_(init) of the scrambling sequence as └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI);

where n_(RNTI) corresponds to an associated RNTI during enhanced controlchannel transmission, n_(s) is a timeslot number, and N_(ID) ^(cell) isa physical cell ID or a virtual cell ID of a cell where the userequipment locates.

In a fifth aspect, the present invention provides a base station,including: at least one processor and a memory, where the memory isconfigured to store an executable program code, and, by reading theexecutable program code stored in the memory to run a programcorresponding to the executable program code, the processor isconfigured to:

obtain a search space and/or a transmission mode corresponding to anenhanced control channel, where the search space includes a UE-specificsearch space and a common search space, and the transmission modeincludes a localized mode and a distributed mode;

perform a scrambling initialization operation according to the searchspace and/or the transmission mode, and determine an initializationvalue of a scrambling sequence;

determine the scrambling sequence according to the initialization valueof the scrambling sequence; and

scramble, according to the scrambling sequence, a transmission signaltransmitted by the enhanced control channel and then transmit, so that auser equipment which receives the transmission signal performs adescrambling operation according to the scrambling sequence in thetransmission signal.

In a sixth aspect, the present invention provides a user equipment,including: at least one processor and a memory, where the memory isconfigured to store an executable program code, and, by reading theexecutable program code stored in the memory to run a programcorresponding to the executable program code, the processor isconfigured to:

when the user equipment receives a transmission signal transmitted by abase station via an enhanced control channel, obtain a search spaceand/or a transmission mode corresponding to the enhanced controlchannel, where the search space includes a UE-specific search space anda common search space, and the transmission mode includes a localizedmode and a distributed mode;

-   -   perform a scrambling initialization operation according to the        search space and/or the transmission mode, and determine an        initialization value of a scrambling sequence;

determine the scrambling sequence according to the initialization valueof the scrambling sequence; and

perform a descrambling operation to a scrambling sequence in thetransmission signal according to the scrambling sequence.

According to the method and the device for scrambling sequenceconfiguration, the user equipment and the base station of the presentinvention, the base station or the user equipment determines aninitialization value of a scrambling sequence according to a searchspace or a transmission mode, or the base station or the user equipmentdetermines the initialization value of the scrambling sequence accordingto both the search space and the transmission mode, which is able toguarantee randomization of interferences between different cells orterminals as far as possible, and meanwhile may be used to make adistinction between channels and/or regions where the channels locate.

BRIEF DESCRIPTION OF DRAWINGS

In order to make technical solutions in embodiments of the presentinvention or the prior art more clearly, accompanying drawings used fordescription of the embodiments or the prior art will be brieflydescribed hereunder. Obviously, the following described drawings aremerely some embodiments of present invention. For persons skilled in theart, other drawings may be obtained based on these drawings without anycreative efforts.

FIG. 1 is a schematic flow chart of a method for scrambling sequenceconfiguration according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart of a method for scrambling sequenceconfiguration according to another embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a device for scramblingsequence configuration according to still another embodiment of thepresent invention;

FIG. 4 is a schematic structural diagram of a user equipment accordingto still another embodiment of the present invention.

DESCRIPTION OF EMBODIMENTS

In order to make objectives, technical solutions, and advantages ofembodiments of the present invention more clearly, the technicalsolutions in embodiments of the present invention will be hereinafterdescribed clearly and comprehensively with reference to accompanyingdrawings in embodiments of the present invention. Obviously, thedescribed embodiments are only a part of embodiments of the presentinvention, rather than all embodiments of the present invention. Allother embodiments obtained by persons of ordinary skill in the art basedon the embodiments of the present invention without any creative effortsshall fall within the protection scope of the present invention.

Embodiment 1

FIG. 1 is a schematic flow chart of a method for scrambling sequenceconfiguration according to this embodiment. The method for scramblingsequence configuration according to this embodiment applies to a casewhere a base station and a terminal use an enhanced control channel toperform information transmission. An execution body of this embodimentis the base station. Regions of the enhanced control channel are dividedinto a common (Common) search space and a user equipment specific(UE-specific) search space, that is, a same enhanced control channel mayonly correspond to the common search space or the UE-specific searchspace, and may also correspond to both the common search space and theUE-specific search space. Both the common search space and theUE-specific search space may employ a transmission mode of a localizedmode and a transmission mode of a distributed mode, or it may be thatthe common search space only supports the transmission mode of thedistributed mode, and the UE-specific search space may support thetransmission mode of the localized mode and the transmission mode of thedistributed mode. The user equipment of this embodiment may be a mobileterminal.

Step 101, obtain a search space and/or a transmission mode correspondingto an enhanced control channel, where the search space includes aUE-specific search space and a common search space, and the transmissionmode includes a localized mode and a distributed mode.

The enhanced control channel is different from a traditional controlchannel which only supports the transmission mode of the distributedmode, and it can support the transmission mode of the distributed modeand the transmission mode of the localized mode. The UE-specific searchspace is used to transmit a scheduling indication signaling for uplinkand downlink information transmission of a user, and the common searchspace is used to transmit a scheduling indication signaling of commoncontrol information, the common control information is, for example, asystem broadcast message, a paging message and a random access message.The transmission mode of the localized mode refers to that one enhancedcontrol channel element (eCCE) of an enhanced control channel performsinformation transmission only in one physical resource block pair (PRBpair), and the transmission mode of the distributed mode refers to thatone enhanced control channel element of an enhanced control channeltransmits information in several PRB pairs which are inconsecutive overtime-frequency to obtain frequency diversity gain. The enhanced controlchannel and its corresponding search space and transmission mode are theprior art, which will not be repeated herein.

Before determining an initialization value of a scrambling sequence, thebase station needs to obtain a search space and/or a transmission modecorresponding to the enhanced control channel firstly. The scramblingsequence is a sequence including a series of scrambling numbers; thedetermining of the initialization value of the scrambling sequence isfor the purpose of determining a determined value of the scramblingsequence.

Step 102, perform a scrambling initialization operation according to thesearch space and/or the transmission mode, and determine aninitialization value of a scrambling sequence.

In the above method, both the scrambling manner and the manner forgenerating the initial scrambling sequence are manners in the prior art.For instance, scrambling is performed by using the formula (1) asfollows.

{tilde over (b)}(i)=(b(i)+c(i))mod 2  (1)

where b(i) is a signal bit transmitted by the enhanced control channel,c(i) is a scrambling sequence, and mod represents modulo. Generation ofthe scrambling sequence c(i) belongs to the prior art, which will not berepeated herein. At this time, the initialization value of thescrambling sequence is

c _(init) =└n _(s)/2┘2⁹ +N _(ID) ^(cell)

where n_(s) is a timeslot number (Timeslot), and N_(ID) ^(cell)represents an identification of a cell where the user equipment locates.The symbol └ ┘ in this embodiment and all the embodiments hereunderrepresents round down.

Step 103, after determining the initialization value of the scramblingsequence, the base station determines the scrambling sequence accordingto the initialization value of the scrambling sequence.

Step 104, the base station scrambles a transmission signal transmittedthrough the enhanced control channel according to the scramblingsequence and then transmits, so that a user equipment which receives thetransmission signal performs a descrambling operation according to thescrambling sequence in the transmission signal and obtains transmissioninformation in the transmission signal.

It should be noted that, the initialization operation of the scramblingsequence according to this embodiment is performed when each subframe isinitialized.

According to the method for scrambling sequence configuration in thisembodiment, a base station determines an initialization value of ascrambling sequence according to a search space or a transmission mode,or the base station determines the initialization value of thescrambling sequence according to both the search space and thetransmission mode, which is able to guarantee randomization ofinterference between different cells or terminals as far as possible,and meanwhile may be used to make a distinction between channels and/orregions where the channels locate.

For instance, in a carrier aggregation scenario, when a time-frequencyresource position of an enhanced control channel corresponding to acommon search space without a carrier indicator field (CIF) is the sameas a time-frequency resource position of an enhanced control channelcorresponding to a UE-specific search space with a carrier indicatorfield, and meanwhile effective payloads (payload) of both controlchannels are right equal, a terminal may distinguish the enhancedcontrol channel from which the received information comes according tothe different scrambling sequences (i.e. the different initializationvalues of the scrambling sequences) of the enhanced control channels ofthe common search space and the UE-specific search space. Additionally,when multiple users transmit information on a same time-frequencyresource position simultaneously, and effective payloads of the enhancedcontrol channels of these users are right equal, the differentscrambling sequences (i.e. different initialization values of scramblingsequences) may be used for the enhanced control channels of these usersto distinguish between different users that transmit informationsimultaneously on the same time-frequency resource position.

Embodiment 2

This embodiment is a specific embodiment on the basis of the embodiment1, where a base station determines an initialization value of ascrambling sequence only based on a search space.

In this embodiment, if the search space is the UE-specific search space,then the base station performs a UE-specific scrambling initializationoperation. An initialization value of a scrambling sequence is usuallyassociated with at least one of a certain parameter specific to a userequipment, such as a radio network temporary identifier (RNTI), atimeslot number of enhanced control channel transmission and a certainparameter specific to a transmission point, such as a transmission pointidentity (ID), etc. Specifically, the initialization value c_(init) ofthe scrambling sequence, which is determined according to theUE-specific scrambling initialization operation, isn_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI).

If the search space is the common search space, then the base stationperforms a transmission point-specific scrambling initializationoperation. An initialization value of a scrambling sequence is usuallyassociated with at least one of a timeslot number of enhanced controlchannel transmission, an associated RNTI during enhanced control channeltransmission and a certain parameter specific to a transmission point(such as a transmission point ID), etc. Specifically, the initializationvalue c_(init) of the scrambling sequence, which is determined accordingto the transmission point-specific scrambling initialization operation,is └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell)or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) is an identification assigned by the base station to theuser equipment, which corresponds to the associated RNTI when theenhanced control channel transmits information, n_(s) is the timeslotnumber, and N_(ID) ^(cell) is an identification of a cell where the userequipment locates, which may be a physical cell identity (ID) or avirtual cell ID configured by a higher layer signaling, the higher layersignaling herein may be a radio resource control (RRC) signaling.

n_(s) and N_(ID) ^(cell) (when corresponding to the physical cell ID)can be obtained immediately after the user equipment completes cellsearch and interpretation of physical broadcast channel (PBCH)information, the RNTI is obtained after the user equipment gets accessto a network randomly, N_(ID) ^(cell) (when corresponding to the virtualcell ID) is configured and issued by a higher layer signaling after arandom access of the user equipment, a specific method for obtainingthese parameters belongs to prior art and will not be repeated herein.The higher layer signaling herein may be an RRC.

It should be noted that, there may be the following two options forN_(ID) ^(cell): one is that, before or after a random access of the userequipment, N_(ID) ^(cell) is a physical cell ID; the other is that,before a random access of the user equipment, N_(ID) ^(cell) is aphysical cell ID, and after the random access of the user equipment,N_(ID) ^(cell) is a virtual cell ID, this virtual cell ID may be thesame as a virtual cell ID during initialization of a demodulationreference signal (DMRS) scrambling sequence of a physical downlinkshared channel (PDSCH), and may also be the same as a virtual cell ID ofa DMRS scrambling sequence of the enhanced control channel, andadditionally, may also be a value which is configured by a higher layersignaling semi-statically or dynamically and is dedicated for theenhanced control channel.

The UE-specific scrambling initialization refers to that initialgeneration of the scrambling depends on a certain parameter of the userequipment, such as a cell radio network temporary identifier (C-RNTI)etc, while the transmission point-specific initialization refers to thatinitial generation of the scrambling depends on a certain parameter ofthe transmission point, such as a cell identification, etc.

Embodiment 3

This embodiment provides a specific embodiment on the basis of theembodiment 1, where a base station determines an initialization value ofa scrambling sequence only based on a search space.

In this embodiment, if the search space is a UE-specific search space ora common search space, then the base station performs a transmissionpoint-specific initialization operation. Specifically, theinitialization value c_(init) of the scrambling sequence, which isdetermined according to the transmission point-specific initializationoperation, is └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI), where, n_(RNTI) corresponds to an associatedradio network temporary identifier RNTI during enhanced control channeltransmission, n_(s) is a timeslot number, and N_(ID) ^(cell) is anidentification of a cell where the user equipment locates, theidentification of the cell may be a physical cell ID or a virtual cellID, this virtual cell ID may be a virtual cell ID configured by a higherlayer signaling. Obtaining of the parameters above is consistent withthe manner of the embodiment 2, which will not be repeated herein.

Different from the embodiment 2, in this embodiment, initializationvalues of the scrambling sequences for the UE-specific search space andthe common search space are the same.

It should be noted that, there may be the following two options forN_(ID) ^(cell): one is that, before or after a random access of the userequipment, N_(ID) ^(cell) is a physical cell ID; the other is that,before a random access of the user equipment, N_(ID) ^(cell) is aphysical cell ID, and after the random access of the user equipment,N_(ID) ^(cell) is a virtual cell ID, this virtual cell ID may be thesame as a virtual cell ID during initialization of a DMRS scramblingsequence of a PDSCH, and may also be the same as a virtual cell ID of aDMRS scrambling sequence of the enhanced control channel, andadditionally, may also be a value which is configured by a higher layersignaling semi-statically or dynamically and is dedicated for theenhanced control channel, details will not be repeated herein.

Embodiment 4

This embodiment is a specific embodiment on the basis of the embodiment1, where a base station determines an initialization value of ascrambling sequence only based on a transmission mode.

In this embodiment, determining, by a base station, an initializationvalue of a scrambling sequence according to a transmission modeincludes:

If the transmission mode is a localized mode, then perform a UE-specificscrambling initialization operation. An initialization value of ascrambling sequence is usually associated with at least one of a certainparameter specific to a user equipment (such as an RNTI), a timeslotnumber of enhanced control channel transmission and a parameter specificto a transmission point (such as a transmission point identification ID)etc. Specifically, the initialization value c_(init) of the scramblingsequence, which is determined according to the UE-specific scramblinginitialization operation, is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the transmission mode is a distributed mode, then perform atransmission point-specific scrambling initialization operation. Aninitialization value of a scrambling sequence is usually associated withat least one of a timeslot number of enhanced control channeltransmission, an associated RNTI during the enhanced control channeltransmission and a certain parameter specific to a transmission point(such as a transmission point ID) etc. Specifically, the initializationvalue c_(init) of the scrambling sequence, which is determined accordingto the transmission point-specific scrambling initialization operation,is └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell)or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is a timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment locates,the identification of the cell may be a physical cell ID or a virtualcell ID, where this virtual cell ID may be a virtual cell ID configuredby a higher layer signaling.

It should be noted that, there may be the following two options forN_(ID) ^(cell): one is that, before or after a random access of the userequipment, N_(ID) ^(cell) is a physical cell ID; the other is that,before a random access of the user equipment, N_(ID) ^(cell) is aphysical cell ID, and after the random access of the user equipment,N_(ID) ^(cell) is a virtual cell ID, where this virtual cell ID may bethe same as a virtual cell ID during initialization of a DMRS scramblingsequence of a PDSCH, and may also be the same as a virtual cell ID of aDMRS scrambling sequence of the enhanced control channel, andadditionally, may also be a value which is configured by a higher layersignaling semi-statically or dynamically and is dedicated for theenhanced control channel, details will not be repeated herein.

Embodiment 5

This embodiment provides a specific embodiment on the basis of theembodiment 1, where an initialization value of a scrambling sequence isdetermined only based on a transmission mode.

If the transmission mode is a localized mode or a distributed mode, thenthe base station performs a UE-specific scrambling initializationoperation. An initialization value of a scrambling sequence is usuallyassociated with at least one of a certain parameter specific to a userequipment (such as an RNTI), a timeslot number of enhanced controlchannel transmission and a certain parameter specific to a transmissionpoint (such as a transmission point identification ID) etc.Specifically, the initialization value c_(init) of the scramblingsequence, which is determined according to the UE-specific scramblinginitialization operation is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the transmission mode is the localized mode or the distributed mode,then the base station performs a transmission point-specific scramblinginitialization operation. An initialization value of a scramblingsequence is usually associated with at least one of a timeslot number ofenhanced control channel transmission, an associated RNTI during theenhanced control channel transmission and a certain parameter specificto a transmission point (such as a transmission point ID) etc.Specifically, the initialization value c_(init) of the scramblingsequence is └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹N_(ID)^(cell) or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is the timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment locates,which may be a physical cell ID or a virtual cell ID of a cell where theuser equipment locates, and this virtual cell ID may be a virtual cellID configured by a higher layer signaling.

This embodiment differs from the embodiment 4 in that, whether thetransmission mode is the localized mode or the distributed mode, thebase station will use a same initialization value of the scramblingsequence.

Embodiment 6

This embodiment provides a specific embodiment on the basis of theembodiment 1, where an initialization value of a scrambling sequence isdetermined by a base station based on a search space and a transmissionmode.

Optionally, determining an initialization value of a scrambling sequenceaccording to a search space and a transmission mode includes:

If the search space is a UE-specific search space and the transmissionmode is a localized mode, then the base station performs a UE-specificscrambling initialization operation. The initialization value of thescrambling sequence is usually associated with at least one of a certainparameter specific to a user equipment (such as an RNTI), a timeslotnumber of enhanced control channel transmission and a certain parameterspecific to a transmission point (such as a transmission pointidentification ID) etc. Specifically, the initialization value c_(init)of the scrambling sequence is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell)or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the search space is the UE-specific search space and the transmissionmode is a distributed mode, then the base station performs atransmission point-specific scrambling initialization operation. Theinitialization value of the scrambling sequence is usually associatedwith at least one of a timeslot number of the enhanced control channeltransmission, an associated RNTI during the enhanced control channeltransmission and a certain parameter specific to a transmission point(such as a transmission point ID) etc. Specifically, the initializationvalue c_(init) of the scrambling sequence is └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is the timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment locates,which may be a physical cell ID or a virtual cell ID, where this virtualcell ID may be a virtual cell ID configured by a higher layer signaling.

Optionally, determining an initialization value of a scrambling sequenceaccording to a search space and a transmission mode includes:

If the search space is a common search space and the transmission modeis a localized mode, then perform a UE-specific scramblinginitialization operation. The initialization value of the scramblingsequence is usually associated with at least one of a certain parameterspecific to user equipment (such as an RNTI), a timeslot number ofenhanced control channel transmission and a certain parameter specificto a transmission point (such as a transmission point identification ID)etc. Specifically, the initialization value c_(init) of the scramblingsequence is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the search space is the common search space and the transmission modeis a distributed mode, then perform a transmission point-specificscrambling initialization operation. The initialization value of thescrambling sequence is usually associated with at least one of atimeslot number of the enhanced control channel transmission, anassociated RNTI during the enhanced control channel transmission and acertain parameter specific to a transmission point (such as atransmission point ID) etc. Specifically, the initialization valuec_(init) of the scrambling sequence, which is determined according tothe transmission point-specific scrambling initialization operation, is└n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is the timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment locates,which may be a physical cell ID or a virtual cell ID, where this virtualcell ID may be a virtual cell ID configured by a higher layer signaling.

Embodiment 7

This embodiment provides a method for scrambling sequence configuration.An execution body of this embodiment is a user equipment.

FIG. 2 is a schematic flow chart of a method for scrambling sequenceconfiguration according to this embodiment.

Step 201, when receiving a transmission signal transmitted by a basestation via an enhanced control channel, a user equipment obtains asearch space and/or a transmission mode corresponding to the enhancedcontrol channel, where the search space includes a UE-specific searchspace and a common search space, and the transmission mode includes alocalized mode and a distributed mode.

The process for generating the transmission signal is consistent withthe embodiment 1, which will not be repeated herein. The user equipmentherein may be a mobile terminal. There are a number of ways for the userequipment to obtain the search space and the transmission mode, forinstance, the user equipment obtains the search space via a preset ruleor higher layer signaling configuration, and may also obtain thetransmission mode via higher layer signaling configuration, and thehigher layer signaling herein may be an RRC signaling.

Step 202, perform a scrambling initialization operation according to thesearch space and/or the transmission mode, and determine aninitialization value of a scrambling sequence.

This step is consistent with step 102 in the embodiment 1, which willnot be repeated herein.

Step 203, determine the scrambling sequence according to theinitialization value of the scrambling sequence.

Step 204, perform a descrambling operation to the transmission signalaccording to the scrambling sequence, and obtain information in thetransmission signal.

Specifically, how the descrambling operation is performed according tothe scrambling sequence, and then real information will be obtained.

According to the method for scrambling sequence configuration in thisembodiment, a user equipment determines an initialization value of ascrambling sequence according to the search space or the transmissionmode, or a terminal determines an initialization value of a scramblingsequence according to both the search space and the transmission mode soas to determine the scrambling sequence, and obtains information in thetransmission signal via the scrambling sequence.

Embodiment 8

This embodiment provides a method for scrambling sequence configurationbased on the embodiment 7. This embodiment only describes step 202 indetails, all other steps are consistent with the embodiment 7, whichwill not be repeated herein. In this embodiment, an initialization valueof a scrambling sequence is determined only based on a search space.

In this embodiment, if the search space is the UE-specific search space,then perform a UE-specific scrambling initialization operation. Aninitialization value of a scrambling sequence is usually associated withat least one of a certain parameter specific to a user equipment, suchas an RNTI, a timeslot number of enhanced control channel transmissionand a certain parameter specific to a transmission point, such as atransmission point identification ID, etc. Specifically, theinitialization value c_(init) of the scrambling sequence, which isdetermined according to the UE-specific scrambling initializationoperation, is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the search space is a common search space, then perform atransmission point-specific scrambling initialization operation. Aninitialization value of a scrambling sequence is usually associated withat least one of a timeslot number of enhanced control channeltransmission, an associated RNTI during the enhanced control channeltransmission and a certain parameter specific to a transmission point(such as a transmission point ID) etc. Specifically, the initializationvalue c_(init) of the scrambling sequence, which is determined accordingto the transmission point-specific scrambling initialization operation,is └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell)or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) is an identification assigned by a base station to theuser equipment, which corresponds to the associated RNTI when theenhanced control channel transmits information, n_(s) is the timeslotnumber, and N_(ID) ^(cell) is an identification of a cell where the userequipment locates, which may be a physical cell ID or a virtual cell IDthat is configured by a higher layer signaling, and the higher layersignaling herein may be an RRC.

n_(s) and N_(ID) ^(cell) (when corresponding to the physical cell ID)can be obtained immediately after the user equipment completes cellsearch and interpretation of physical broadcast channel information, theRNTI is obtained after the user equipment gets access to a networkrandomly, N_(ID) ^(cell) (when corresponding to the virtual cell ID) isconfigured and issued by a higher layer signaling after a random accessof the user equipment, and a specific method for obtaining theseparameters is the prior art, which will not be repeated herein. Thehigher layer signaling herein may be RRC.

It should be noted that, there may be the following two options forN_(ID) ^(cell): one is that, before or after a random access of the userequipment, N_(ID) ^(cell) is a physical cell ID; the other is that,before a random access of the user equipment, N_(ID) ^(cell) is aphysical cell ID, and after the random access of the user equipment,N_(ID) ^(cell) is a virtual cell ID, this virtual cell ID may be thesame as a virtual cell ID during initialization of a DMRS scramblingsequence of a PDSCH, and may also be the same as a virtual cell ID of aDMRS scrambling sequence of the enhanced control channel, andadditionally, may also be a value which is configured by a higher layersignaling semi-statically or dynamically and is dedicated for theenhanced control channel, details will not be repeated herein.

Embodiment 9

This embodiment provides a method for scrambling sequence configurationbased on the embodiment 7. This embodiment only describes step 202 indetails, all other steps are consistent with the embodiment 7, whichwill not be repeated herein. In this embodiment, an initialization valueof a scrambling sequence is determined only based on a search space.

In this embodiment, if the search space is a UE-specific search space ora common search space, then perform a transmission point-specificinitialization operation. Specifically, the initialization valuec_(init) of the scrambling sequence, which is determined by the userequipment according to the transmission point-specific initializationoperation is └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI), where n_(RNTI) corresponds to an associatedradio network temporary identifier RNTI during the enhanced controlchannel transmission, n_(s) is a timeslot number, and N_(ID) ^(cell) isan identification of a cell where the user equipment locates, theidentification of the cell may be a physical cell ID or a virtual cellID, and this virtual cell ID may be a virtual cell ID configured by ahigher layer signaling. Obtaining of the parameters above is consistentwith the manner of the embodiment 2, which will not be repeated herein.

Different from the embodiment 8, in this embodiment, initializationvalues of the scrambling sequences for the UE-specific search space andthe common search space are the same.

It should be noted that, there may be the following two options forN_(ID) ^(cell): one is that, before or after a random access of the userequipment, N_(ID) ^(cell) is a physical cell ID; the other is that,before a random access of the user equipment, N_(ID) ^(cell) is aphysical cell ID, and after the random access of the user equipment,N_(ID) ^(cell) is a virtual cell ID, this virtual cell ID may be thesame as a virtual cell ID during initialization of a DMRS scramblingsequence of a PDSCH, and may also be the same as a virtual cell ID of aDMRS scrambling sequence of the enhanced control channel, andadditionally, may also be a value which is configured by a higher layersignaling semi-statically or dynamically and is dedicated for theenhanced control channel, details will not be repeated herein.

Embodiment 10

This embodiment provides a method for scrambling sequence configurationbased on the embodiment 7. This embodiment only describes step 202 indetails, all other steps are consistent with the embodiment 7, whichwill not be repeated herein. In this embodiment, an initialization valueof a scrambling sequence is determined only based on a transmissionmode.

In this embodiment, determining, by a user equipment, an initializationvalue of a scrambling sequence according to a transmission modeincludes:

If the transmission mode is a localized mode, then the user equipmentperforms a UE-specific scrambling initialization operation. Aninitialization value of a scrambling sequence is usually associated withat least one of a certain parameter specific to a user equipment (suchas an RNTI), a timeslot number of enhanced control channel transmissionand a certain parameter specific to a transmission point (such as atransmission point identification ID) etc. Specifically, theinitialization value c_(init) of the scrambling sequence, which isdetermined according to the UE-specific scrambling initializationoperation, is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the transmission mode is a distributed mode, then the user equipmentperforms a transmission point-specific scrambling initializationoperation. An initialization value of a scrambling sequence is usuallyassociated with at least one of a timeslot number of enhanced controlchannel transmission, an associated RNTI during the enhanced controlchannel transmission and a certain parameter specific to a transmissionpoint (such as a transmission point ID) etc. Specifically, theinitialization value c_(init) of the scrambling sequence, which isdetermined according to the transmission point-specific scramblinginitialization operation, is └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is the timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment locates,the identification of the cell may be a physical cell ID or a virtualcell ID, this virtual cell ID may be a virtual cell ID configured by ahigher layer signaling.

It should be noted that, there may be the following two options forN_(ID) ^(cell): one is that, before or after a random access of the userequipment, N_(ID) ^(cell) is a physical cell ID; the other is that,before a random access of the user equipment, N_(ID) ^(cell) is aphysical cell ID, and after the random access of the user equipment,N_(ID) ^(cell) is a virtual cell ID, this virtual cell ID may be thesame as a virtual cell ID during initialization of a DMRS scramblingsequence of a PDSCH, and may also be the same as a virtual cell ID of aDMRS scrambling sequence of the enhanced control channel, andadditionally, may also be a value which is configured by a higher layersignaling semi-statically or dynamically and is dedicated for theenhanced control channel, details will not be repeated herein.

Embodiment 11

This embodiment provides a method for scrambling sequence configurationbased on the embodiment 7. This embodiment only describes step 202 indetails, all other steps are consistent with the embodiment 7, whichwill not be repeated herein. In this embodiment, an initialization valueof a scrambling sequence is determined only based on a transmissionmode.

If the transmission mode is a localized mode or a distributed mode, thena user equipment performs a UE-specific scrambling initializationoperation. An initialization value of a scrambling sequence is usuallyassociated with at least one of a certain parameter specific to a userequipment (such as an RNTI), a timeslot number of enhanced controlchannel transmission and a certain parameter specific to a transmissionpoint (such as a transmission point identification ID) etc.Specifically, the initialization value c_(init) of the scramblingsequence, which is determined according to the UE-specific scramblinginitialization operation, is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the transmission mode is the localized mode or the distributed mode,then the user equipment performs a transmission point-specificscrambling initialization operation. An initialization value of ascrambling sequence is usually associated with at least one of atimeslot number of enhanced control channel transmission, an associatedRNTI during the enhanced control channel transmission and a certainparameter specific to a transmission point (such as a transmission pointID) etc. Specifically, the initialization value c_(init) of thescrambling sequence is └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is the timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment locates,which may be a physical cell ID or a virtual cell ID of a cell where theuser equipment locates, this virtual cell ID may be a virtual cell IDconfigured by a higher layer signaling.

This embodiment differs from the embodiment 10 in that, whether thetransmission mode is the localized mode or the distributed mode, aterminal will use a same initialization value of the scramblingsequence.

Embodiment 12

This embodiment provides a method for scrambling sequence configurationbased on the embodiment 7. This embodiment only describes step 202 indetails, all other steps are consistent with the embodiment 7, whichwill not be repeated herein. In this embodiment, an initialization valueof a scrambling sequence is determined by a user equipment based on asearch space and a transmission mode only.

Optionally, determining, by a user equipment, an initialization value ofa scrambling sequence according to a search space and a transmissionmode, includes:

If the search space is a UE-specific search space and the transmissionmode is a localized mode, then performing a UE-specific scramblinginitialization operation. An initialization value of a scramblingsequence is usually associated with at least one of a certain parameterspecific to a user equipment (such as an RNTI), a timeslot number ofenhanced control channel transmission and a certain parameter specificto a transmission point (such as a transmission point identification ID)etc. Specifically, the initialization value c_(init) of the scramblingsequence is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the search space is the UE-specific search space and the transmissionmode is a distributed mode, then performing a transmissionpoint-specific scrambling initialization operation. An initializationvalue of a scrambling sequence is usually associated with at least oneof a timeslot number of enhanced control channel transmission, anassociated RNTI during the enhanced control channel transmission and acertain parameter specific to a transmission point (such as atransmission point ID) etc. Specifically, the initialization valuec_(init) of the scrambling sequence is └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is the timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment locates,which may be a physical cell ID or a virtual cell ID, this virtual cellID may be a virtual cell ID configured by a higher layer signaling.

Optionally, the determining of the initialization value of thescrambling sequence according to the search space and the transmissionmode includes:

If the search space is a common search space and the transmission modeis the localized mode, then performing a UE-specific scramblinginitialization operation. An initialization value of a scramblingsequence is usually associated with at least one of a certain parameterspecific to a user equipment (such as an RNTI), a timeslot number ofenhanced control channel transmission and a certain parameter specificto a transmission point (such as a transmission point identification ID)etc. Specifically, the initialization value c_(init) of the scramblingsequence is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the search space is the common search space and the transmission modeis the distributed mode, then performing a transmission point-specificscrambling initialization operation. An initialization value of ascrambling sequence is usually associated with at least one of atimeslot number of enhanced control channel transmission, an associatedRNTI during the enhanced control channel transmission and a certainparameter specific to a transmission point (such as a transmission pointID) etc. Specifically, the initialization value c_(init) of thescrambling sequence, which is determined according to the transmissionpoint-specific scrambling initialization operation, is└n_(s)/2┘·2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is the timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment locates,which may be a physical cell ID or a virtual cell ID, this virtual cellID may be a virtual cell ID configured by a higher layer signaling.

Embodiment 13

This embodiment provides a device for scrambling sequence configuration,which is used to execute the method for scrambling sequenceconfiguration in the embodiment 1. The device for scrambling sequenceconfiguration in this embodiment may be integrated in a base station.

As shown in FIG. 3 the device 300 for scrambling sequence configurationin this embodiment includes a first obtaining module 301, a firstdetermining module 302, a second determining module 303 and atransmitting module 304.

The first obtaining module 301 is configured to obtain a search spaceand/or a transmission mode corresponding to an enhanced control channel,where the search space includes a UE-specific search space and a commonsearch space, and the transmission mode includes a localized mode and adistributed mode; the first determining module 302 is configured toperform a scrambling initialization operation according to the searchspace and/or the transmission mode obtained in the first obtainingmodule 301, and determine an initialization value of a scramblingsequence. The second determining module 303 is configured to determinethe scrambling sequence according to the initialization value of thescrambling sequence determined in the first determining module 302; andthe transmitting module 304 is configured to scramble, according to thescrambling sequence determined in the second determining module 303, atransmission signal transmitted by the enhanced control channel and thentransmit, so that a user equipment 400 which receives the transmissionsignal performs a descrambling operation according to the scramblingsequence in the transmission signal.

A operation method of the device 300 for scrambling sequenceconfiguration is consistent with the embodiment 1, which will not berepeated herein.

According to the device 300 for scrambling sequence configuration inthis embodiment, an initialization value of a scrambling sequence isdetermined according to a search space or a transmission mode, or theinitialization value of the scrambling sequence is determined accordingto both the search space and the transmission mode, which is able toguarantee randomization of interferences between different cells orterminals as far as possible, and meanwhile may be used to make adistinction between channels and/or regions where the channels locate.

Embodiment 14

This embodiment further illustrates the first determining module 302 inthe embodiment 13; all other modules are consistent with the embodiment13, which will not be repeated herein.

In this embodiment, the first determining module 302 is specificallyconfigured to:

if the search space is a UE-specific search space, then perform aUE-specific scrambling initialization operation, and determine aninitialization value of a scrambling sequence;

if the search space is a common search space, then perform atransmission point-specific scrambling initialization operation, anddetermine the initialization value of the scrambling sequence.

If the search space is the UE-specific search space, then perform theUE-specific scrambling initialization operation. Generally, aninitialization value of a scrambling sequence is associated with atleast one of a certain parameter specific to a user equipment 400, suchas an RNTI, a timeslot number of enhanced control channel transmissionand a certain parameter specific to a transmission point, such as atransmission point identification ID, etc. Specifically, theinitialization value c_(init) of the scrambling sequence, which isdetermined according to the UE-specific scrambling initializationoperation, is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the search space is the common search space, then perform thetransmission point-specific scrambling initialization operation. Aninitialization value of a scrambling sequence is usually associated withat least one of a timeslot number of enhanced control channeltransmission, an associated RNTI during the enhanced control channeltransmission and a certain parameter specific to a transmission point(such as a transmission point ID), etc. Specifically, the initializationvalue c_(init) of the scrambling sequence, which is determined accordingto the transmission point-specific scrambling initialization operation,is └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell)or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) is an identification assigned by the base station to theuser equipment 400, which corresponds to the associated RNTI when theenhanced control channel transmits information, n_(s) is the timeslotnumber, and N_(ID) ^(cell) is an identification of a cell where the userequipment 400 locates, which may be a physical cell ID, or a virtualcell ID that is configured by a higher layer signaling, the higher layersignaling herein may be RRC.

n_(s) and N_(ID) ^(cell) (when corresponding to the physical cell ID)can be obtained immediately after the user equipment 400 completes cellsearch and interpretation of physical broadcast channel information, theRNTI is obtained after the user equipment 400 gets access to a networkrandomly, N_(ID) ^(cell) (when corresponding to the virtual cell ID) isconfigured and issued by a higher layer signaling after a random accessof the user equipment 400, a specific method for obtaining theseparameters is the prior art, which will not be repeated herein. Thehigher layer signaling herein may be RRC.

It should be noted that, there may be the following two options forN_(ID) ^(cell): one is that, before or after a random access of the userequipment 400, N_(ID) ^(cell) is a physical cell ID; the other is that,before a random access of the user equipment 400, N_(ID) ^(cell) is aphysical cell ID, and after the random access of the user equipment 400,N_(ID) ^(cell) is a virtual cell ID, this virtual cell ID may be thesame as a virtual cell ID during initialization of a DMRS scramblingsequence of a PDSCH, and may also be the same as a virtual cell ID of aDMRS scrambling sequence of the enhanced control channel, andadditionally, may also be a value which is configured by a higher layersignaling semi-statically or dynamically and is dedicated for theenhanced control channel, details will not be repeated herein.

Embodiment 15

This embodiment further illustrates the first determining module 302 inthe embodiment 13; all other modules are consistent with the embodiment13, which will not be repeated herein.

In this embodiment, the first determining module 302 is specificallyconfigured to:

if the search space is a UE-specific search space or a common searchspace, then perform a transmission point-specific initializationoperation, and determine an initialization value of a scramblingsequence.

In this embodiment, if the search space is the UE-specific search spaceor the common search space, then perform the transmission point-specificinitialization operation. Specifically, the initialization valuec_(init) of the scrambling sequence, which is determined according tothe transmission point-specific initialization operation is└n_(s)/2┘·2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI), where n_(RNTI)corresponds to an associated radio network temporary identifier RNTIduring enhanced control channel transmission, n_(s) is a timeslotnumber, and N_(ID) ^(cell) is an identification of a cell where the userequipment 400 locates, the identification of the cell may be a physicalcell ID or a virtual cell ID, this virtual cell ID may be a virtual cellID configured by a higher layer signaling. Obtaining of the parametersabove is consistent with the manner of the embodiment 2, which will notbe repeated herein.

Different from the embodiment 14, in this embodiment, initializationvalues of the scrambling sequences for the UE-specific search space andthe common search space are the same.

It should be noted that, there may be following two options for N_(ID)^(cell): one is that, before or after a random access of the userequipment, N_(ID) ^(cell) is a physical cell ID; the other is that,before a random access of the user equipment 400, N_(ID) ^(cell) is aphysical cell ID, and after the random access of the user equipment 400,N_(ID) ^(cell) is a virtual cell ID, this virtual cell ID may be thesame as a virtual cell ID during initialization of a DMRS scramblingsequence of a PDSCH, and may also be the same as a virtual cell ID of aDMRS scrambling sequence of the enhanced control channel, andadditionally, may also be a value which is configured by a higher layersignaling semi-statically or dynamically and is dedicated for theenhanced control channel, details will not be repeated herein.

Embodiment 16

This embodiment further illustrates the first determining module 302 inthe embodiment 13; all other modules are consistent with the embodiment13, which will not be repeated herein.

In this embodiment, the first determining module 302 is specificallyconfigured to:

if the transmission mode is a localized mode, then perform a UE-specificscrambling initialization operation, and determine an initializationvalue of a scrambling sequence;

if the transmission mode is a distributed mode, then perform atransmission point-specific scrambling initialization operation, anddetermine the initialization value of the scrambling sequence.

In this embodiment, the determining of the initialization value of thescrambling sequence by the first determining module 302 according to thetransmission mode includes:

If the transmission mode is the localized mode, then the firstdetermining module 302 performs a UE-specific scrambling initializationoperation. An initialization value of a scrambling sequence is usuallyassociated with at least one of a certain parameter specific to a userequipment 400 (such as an RNTI), a timeslot number of enhanced controlchannel transmission and a certain parameter specific to a transmissionpoint (such as a transmission point identification ID), etc.Specifically, the initialization value c_(init) of the scramblingsequence, which is determined according to the UE-specific scramblinginitialization operation, is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the transmission mode is the distributed mode, then the firstdetermining module 302 performs the transmission point-specificscrambling initialization operation. An initialization value of ascrambling sequence is usually associated with at least one of atimeslot number of enhanced control channel transmission, an associatedRNTI during the enhanced control channel transmission and a certainparameter specific to a transmission point (such as a transmission pointID) etc. Specifically, the initialization value c_(init) of thescrambling sequence, which is determined according to the transmissionpoint-specific scrambling initialization operation, is└n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is the timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment locates,the identification of the cell may be a physical cell ID or a virtualcell ID, this virtual cell ID may be a virtual cell ID configured by ahigher layer signaling.

It should be noted that, there may be two following options for N_(ID)^(cell): one is that, before or after a random access of the userequipment 400, N_(ID) ^(cell) is a physical cell ID; the other is that,before a random access of the user equipment 400, N_(ID) ^(cell) is aphysical cell ID, and after the random access of the user equipment 400,N_(ID) ^(cell) is a virtual cell ID, this virtual cell ID may be thesame as a virtual cell ID during initialization of a DMRS scramblingsequence of a PDSCH, and may also be the same as a virtual cell ID of aDMRS scrambling sequence of the enhanced control channel, andadditionally, may also be a value which is configured by a higher layersignaling semi-statically or dynamically and is dedicated for theenhanced control channel, details will not be repeated herein.

Embodiment 17

This embodiment further illustrates the first determining module 302 inthe embodiment 13; all other modules are consistent with the embodiment13, which will not be repeated herein.

In this embodiment, the first determining module 302 is specificallyconfigured to:

if the transmission mode is a localized mode or a distributed mode, thenperform a UE-specific scrambling initialization operation, and determinean initialization value of a scrambling sequence; or

if the transmission mode is the localized mode or the distributed mode,then perform a transmission point-specific scrambling initializationoperation, and determine the initialization value of the scramblingsequence.

If the transmission mode is the localized mode or the distributed mode,then the device 300 for scrambling sequence configuration performs theUE-specific scrambling initialization operation. An initialization valueof a scrambling sequence is usually associated with at least one of acertain parameter specific to a user equipment 400 (such as an RNTI), atimeslot number of enhanced control channel transmission and a certainparameter specific to a transmission point (such as a transmission pointidentification ID), etc. Specifically, the initialization value c_(init)of the scrambling sequence, which is determined according to theUE-specific scrambling initialization operation, isn_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI).

If the transmission mode is the localized mode or the distributed mode,then the device 300 for scrambling sequence configuration performs thetransmission point-specific scrambling initialization operation. Aninitialization value of a scrambling sequence is usually associated withat least one of a timeslot number of enhanced control channeltransmission, an associated RNTI during the enhanced control channeltransmission and a certain parameter specific to a transmission point(such as a transmission point ID), etc. Specifically, the initializationvalue c_(init) of the scrambling sequence is └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI), corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is the timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment 400locates, which may be a physical cell ID or a virtual cell ID of a cellwhere the user equipment locates, this virtual cell ID may be a virtualcell ID configured by a higher layer signaling.

This embodiment differs from the embodiment 3 in that, whether thetransmission mode is the localized mode or the distributed mode, thedevice 300 for scrambling sequence configuration will use a sameinitialization value of the scrambling sequence.

Embodiment 18

This embodiment further illustrates the first determining module 302 inthe embodiment 13; all other modules are consistent with the embodiment13, which will not be repeated herein.

In this embodiment, the first determining module 302 is specificallyconfigured to:

if the search space is a UE-specific search space and the transmissionmode is a localized mode, then perform a UE-specific scramblinginitialization operation;

if the search space is the UE-specific search space and the transmissionmode is a distributed mode, then perform a transmission point-specificscrambling initialization operation.

Optionally, determining of the initialization value of the scramblingsequence according to the search space and the transmission mode,includes:

If the search space is the UE-specific search space and the transmissionmode is the localized mode, then the device 300 for scrambling sequenceconfiguration performs the UE-specific scrambling initializationoperation. An initialization value of a scrambling sequence is usuallyassociated with at least one of a certain parameter specific to a userequipment 400 (such as an RNTI), a timeslot number of enhanced controlchannel transmission and a certain parameter specific to a transmissionpoint (such as a transmission point identification ID), etc.Specifically, the initialization value c_(init) of the scramblingsequence is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the search space is the UE-specific search space and the transmissionmode is the distributed mode, then the device 300 for scramblingsequence configuration performs the transmission point-specificscrambling initialization operation. An initialization value of ascrambling sequence is usually associated with at least one of atimeslot number of enhanced control channel transmission, an associatedRNTI during the enhanced control channel transmission and a certainparameter specific to a transmission point (such as a transmission pointID), etc. Specifically, the initialization value c_(init) of thescrambling sequence is └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is the timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment 400locates, which may be a physical cell ID or a virtual cell ID, thisvirtual cell ID may be a virtual cell ID configured by a higher layersignaling.

Optionally, the determining of the initialization value of thescrambling sequence according to the search space and the transmissionmode includes:

If the search space is the common search space and the transmission modeis the localized mode, then performing a UE-specific scramblinginitialization operation. An initialization value of a scramblingsequence is usually associated with at least one of a certain parameterspecific to a user equipment 400 (such as an RNTI), a timeslot number ofenhanced control channel transmission and a certain parameter specificto a transmission point (such as a transmission point identificationID), etc. Specifically, the initialization value c_(init) of thescrambling sequence is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the search space is the common search space and the transmission modeis the distributed mode, then performing a transmission point-specificscrambling initialization operation. An initialization value of ascrambling sequence is usually associated with at least one of atimeslot number of enhanced control channel transmission, an associatedRNTI during the enhanced control channel transmission and a certainparameter specific to a transmission point (such as a transmission pointID), etc. Specifically, the initialization value c_(init) of thescrambling sequence, which is determined according to the transmissionpoint-specific scrambling initialization operation is└n_(s)/2┘·2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is the timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment 400locates, which may be a physical cell ID or a virtual cell ID, thisvirtual cell ID may be a virtual cell ID configured by a higher layersignaling.

Embodiment 19

This embodiment provides a user equipment, which is used to execute themethod for scrambling sequence configuration described in the embodiment7. The user equipment in this embodiment may be a mobile terminal.

FIG. 4 is a schematic structural diagram of a user equipment accordingto this embodiment. The user equipment 400 includes a second obtainingmodule 401, a third determining module 402, a fourth determining module403 and a descrambling module 404.

The second obtaining module 401 is configured to obtain a search spaceand/or a transmission mode corresponding to an enhanced control channelwhen the user equipment 400 receives a transmission signal transmittedby a device 300 for scrambling sequence configuration via the enhancedcontrol channel, where the search space includes a UE-specific searchspace and a common search space, and the transmission mode includes alocalized mode and a distributed mode; the third determining module 402is configured to perform a scrambling initialization operation accordingto the search space and/or the transmission mode obtained by the secondobtaining module 401, and determine an initialization value of ascrambling sequence; the fourth determining module 403 is configured todetermine the scrambling sequence according to the initialization valueof the scrambling sequence obtained by the third determining module 402;and the descrambling module 404 is configured to perform a descramblingoperation to scrambling sequences in the transmission signal accordingto the scrambling sequence determined by the fourth determining module403.

A operation method of the user equipment 400 is consistent with theembodiment 7, which will not be repeated herein.

According to the user equipment 400 in this embodiment, the userequipment 400 determines an initialization value of a scramblingsequence according to the search space or the transmission mode, or aterminal determines an initialization value of a scrambling sequenceaccording to both the search space and the transmission mode, so as todetermine the scrambling sequence, and obtain information in thetransmission signal via the scrambling sequence.

Embodiment 20

This embodiment further illustrates the user equipment in the embodiment19, and this embodiment merely describes the third determining module402 in the user equipment 400 in details; all other modules areconsistent with the embodiment 19, which will not be repeated herein.

The third determining module 402 in this embodiment is specificallyconfigured to:

if the search space is the UE-specific search space, then perform aUE-specific scrambling initialization operation, and determine aninitialization value of a scrambling sequence;

if the search space is the common search space, then perform atransmission point-specific scrambling initialization operation, anddetermine the initialization value of the scrambling sequence.

In this embodiment, if the search space is the UE-specific search space,then perform a UE-specific scrambling initialization operation. Aninitialization value of a scrambling sequence is usually associated withat least one of a certain parameter specific to the user equipment 400,such as an RNTI, a timeslot number of enhanced control channeltransmission and a certain parameter specific to a transmission point,such as a transmission point identification ID etc. Specifically, theinitialization value c_(init) of the scrambling sequence, which isdetermined according to the UE-specific scrambling initializationoperation, is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the search space is the common search space, then perform atransmission point-specific scrambling initialization operation. Aninitialization value of a scrambling sequence is usually associated withat least one of a timeslot number of enhanced control channeltransmission, an associated RNTI during the enhanced control channeltransmission and a certain parameter specific to a transmission point(such as a transmission point ID), etc. Specifically, the initializationvalue c_(init) of the scrambling sequence, which is determined accordingto the transmission point-specific scrambling initialization operation,is └n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell)or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) is an identification assigned by a base station to theuser equipment 400, which corresponds to the associated RNTI when theenhanced control channel transmits information, n_(s) is the timeslotnumber, and N_(ID) ^(cell) is an identification of a cell where the userequipment 400 locates, which may be a physical cell ID or a virtual cellID configured by a higher layer signaling, the higher layer signalingherein may be RRC.

n_(s) and N_(ID) ^(cell) (when corresponding to the physical cell ID)can be obtained immediately after the user equipment 400 completes cellsearch and interpretation of physical broadcast channel information, theRNTI is obtained after the user equipment 400 gets access to a networkrandomly, N_(ID) ^(cell) (when corresponding to the virtual cell ID) isconfigured and issued by a higher layer signaling after a random accessof the user equipment 400, a specific method for obtaining theseparameters is the prior art, which will not be repeated herein. Thehigher layer signaling herein may be RRC.

It should be noted that, there may be two following options for N_(ID)^(cell): one is that, before or after a random access of the userequipment 400, N_(ID) ^(cell) is a physical cell ID; the other is that,before a random access of the user equipment 400, N_(ID) ^(cell) is aphysical cell ID, and after the random access of the user equipment 400,N_(ID) ^(cell) is a virtual cell ID, this virtual cell ID may be thesame as a virtual cell ID during initialization of a DMRS scramblingsequence of a PDSCH, and may also be the same as a virtual cell ID of aDMRS scrambling sequence of the enhanced control channel, andadditionally, may also be a value which is configured by a higher layersignaling semi-statically or dynamically and is dedicated for theenhanced control channel, details will not be repeated herein.

Embodiment 21

This embodiment further illustrates the user equipment in the embodiment19, and this embodiment merely describes the third determining module402 in the user equipment 400 in details; all other modules areconsistent with the embodiment 19, which will not be repeated herein.

In this embodiment, the third determining module 402 is specificallyconfigured to:

if the search space is a UE-specific search space or a common searchspace, then perform a transmission point-specific initializationoperation, and determine an initialization value of a scramblingsequence.

In this embodiment, if the search space is the UE-specific search spaceor the common search space, then perform the transmission point-specificinitialization operation. Specifically, the initialization valuec_(init) of the scrambling sequence, which is determined by the userequipment 400 according to the transmission point-specificinitialization operation is └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI), where, n_(RNTI) corresponds to an associatedradio network temporary identifier RNTI during enhanced control channeltransmission, n_(s) is a timeslot number, and N_(ID) ^(cell) is anidentification of a cell where the user equipment 400 locates, theidentification of the cell may be a physical cell ID or a virtual cellID, this virtual cell ID may be a virtual cell ID configured by a higherlayer signaling. Obtaining of the parameters above is consistent withthe manner of the embodiment 2, which will not be repeated herein.

Different from the embodiment 8, in this embodiment, initializationvalues of the scrambling sequences for the UE-specific search space andthe common search space are the same.

It should be noted that, there may be two following options for inN_(ID) ^(cell): one is that, before or after a random access of the userequipment 400, N_(ID) ^(cell) is a physical cell ID; the other is that,before a random access of the user equipment 400, N_(ID) ^(cell) is aphysical cell ID, and after the random access of the user equipment 400,N_(ID) ^(cell) is a virtual cell ID, this virtual cell ID may be thesame as a virtual cell ID during initialization of a DMRS scramblingsequence of a PDSCH, and may also be the same as a virtual cell ID of aDMRS scrambling sequence of the enhanced control channel, andadditionally, may also be a value which is configured by a higher layersignaling semi-statically or dynamically and is dedicated for theenhanced control channel, details will not be repeated herein.

Embodiment 22

This embodiment further illustrates the user equipment in the embodiment19, and this embodiment merely describes the third determining module402 in the user equipment 400 in details; all other modules areconsistent with the embodiment 19, which will not be repeated herein.

In this embodiment, the third determining module 402 is specificallyconfigured to:

if the transmission mode is a localized mode, then perform a UE-specificscrambling initialization operation, and determine an initializationvalue of a scrambling sequence;

if the transmission mode is a distributed mode, then perform atransmission point-specific scrambling initialization operation, anddetermine the initialization value of the scrambling sequence.

If the transmission mode is the localized mode, then the user equipment400 performs the UE-specific scrambling initialization operation. Aninitialization value of a scrambling sequence is usually associated withat least one of a certain parameter specific to the user equipment 400(such as an RNTI), a timeslot number of enhanced control channeltransmission and a certain parameter specific to a transmission point(such as a transmission point identification ID) etc. Specifically, theinitialization value c_(init) of the scrambling sequence, which isdetermined according to the UE-specific scrambling initializationoperation, is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the transmission mode is the distributed mode, then the userequipment 400 performs the transmission point-specific scramblinginitialization operation. An initialization value of a scramblingsequence is usually associated with at least one of a timeslot number ofenhanced control channel transmission, an associated RNTI during theenhanced control channel transmission and a certain parameter specificto a transmission point (such as a transmission point ID) etc.Specifically, the initialization value c_(init) of the scramblingsequence, which is determined according to the transmissionpoint-specific scrambling initialization operation, is└n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is the timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment 400locates, the identification of the cell may be a physical cell ID or avirtual cell ID, this virtual cell ID may be a virtual cell IDconfigured by a higher layer signaling.

It should be noted that, there may be two following options for N_(ID)^(cell): one is that, before or after a random access of the userequipment 400, N_(ID) ^(cell) is a physical cell ID; the other is that,before a random access of the user equipment 400, N_(ID) ^(cell) is aphysical cell ID, and after the random access of the user equipment 400,N_(ID) ^(cell) is a virtual cell ID, this virtual cell ID may be thesame as a virtual cell ID during initialization of a DMRS scramblingsequence of a PDSCH, and may also be the same as a virtual cell ID of aDMRS scrambling sequence of the enhanced control channel, andadditionally, may also be a value which is configured by a higher layersignaling semi-statically or dynamically and is dedicated for theenhanced control channel, details will not be repeated herein.

Embodiment 23

This embodiment further illustrates the user equipment in the embodiment19, and this embodiment merely describes the third determining module402 in the user equipment 400 in details; all other modules areconsistent with the embodiment 19, which will not be repeated herein.

In this embodiment, the third determining module 402 is specificallyconfigured to:

if the transmission mode is a localized mode or a distributed mode, thenperform a UE-specific scrambling initialization operation, and determinean initialization value of a scrambling sequence; or

if the transmission mode is the localized mode or the distributed mode,then perform a transmission point-specific scrambling initializationoperation, and determine the initialization value of the scramblingsequence.

If the transmission mode is the localized mode or the distributed mode,then the user equipment 400 performs the UE-specific scramblinginitialization operation. An initialization value of a scramblingsequence is usually associated with at least one of a certain parameterspecific to the user equipment 400 (such as an RNTI), a timeslot numberof enhanced control channel transmission and a certain parameterspecific to a transmission point (such as a transmission pointidentification ID), etc. Specifically, the initialization value c_(init)of the scrambling sequence, which is determined according to theUE-specific scrambling initialization operation, isn_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI).

If the transmission mode is the localized mode or the distributed mode,then the user equipment 400 performs the transmission point-specificscrambling initialization operation. An initialization value of ascrambling sequence is usually associated with at least one of atimeslot number of enhanced control channel transmission, an associatedRNTI during the enhanced control channel transmission and a certainparameter specific to a transmission point (such as a transmission pointID), etc. Specifically, the initialization value c_(init) of thescrambling sequence is └n_(s)/2┘2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is the timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment 400locates, which may be a physical cell ID or a virtual cell ID of a cellwhere the user equipment locates, this virtual cell ID may be a virtualcell ID configured by a higher layer signaling.

This embodiment differs from the embodiment 22 in that, whether thetransmission mode is the localized mode or the distributed mode, aterminal will use a same initialization value of the scramblingsequence.

Embodiment 24

This embodiment further illustrates the user equipment in the embodiment19, and this embodiment merely describes the third determining module402 in the user equipment 400 in details; all other modules areconsistent with the embodiment 19, which will not be repeated herein.

In this embodiment, the third determining module 402 is specificallyconfigured to:

if the search space is a UE-specific search space and the transmissionmode is a localized mode, then perform a UE-specific scramblinginitialization operation;

if the search space is the UE-specific search space and the transmissionmode is a distributed mode, then perform a transmission point-specificscrambling initialization operation.

Or, the third determining module 402 is specifically configured to:

if the search space is a common search space and the transmission modeis the localized mode, then perform a UE-specific scramblinginitialization operation;

if the search space is the common search space and the transmission modeis the distributed mode, then perform a transmission point-specificscrambling initialization operation.

Optionally, the determining of the initialization value of thescrambling sequence by the user equipment 400 according to the searchspace and the transmission mode includes:

If the search space is the UE-specific search space and the transmissionmode is the localized mode, then performing a UE-specific scramblinginitialization operation. An initialization value of a scramblingsequence is usually associated with at least one of a certain parameterspecific to the user equipment 400 (such as an RNTI), a timeslot numberof enhanced control channel transmission and a certain parameterspecific to a transmission point (such as a transmission pointidentification ID), etc. Specifically, the initialization value of thescrambling sequence is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the search space is the UE-specific search space and the transmissionmode is the distributed mode, then performing a transmissionpoint-specific scrambling initialization operation. An initializationvalue of a scrambling sequence is usually associated with at least oneof a timeslot number of enhanced control channel transmission, anassociated RNTI during the enhanced control channel transmission and acertain parameter specific to a transmission point (such as atransmission point ID), etc. Specifically, the initialization valuec_(init) of the scrambling sequence is └n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is the timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment 400locates, which may be a physical cell ID or a virtual cell ID, thisvirtual cell ID may be a virtual cell ID configured by a higher layersignaling.

Optionally, the determining of the initialization value of thescrambling sequence according to the search space and the transmissionmode includes:

If the search space is the common search space and the transmission modeis the localized mode, then performing the UE-specific scramblinginitialization operation. An initialization value of a scramblingsequence is usually associated with at least one of a certain parameterspecific to the user equipment 400 (such as an RNTI), a timeslot numberof enhanced control channel transmission and a certain parameterspecific to a transmission point (such as a transmission pointidentification ID), etc. Specifically, the initialization value c_(init)of the scrambling sequence is n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell)or (└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

If the search space is the common search space and the transmission modeis the distributed mode, then performing the transmission point-specificscrambling initialization operation. An initialization value of ascrambling sequence is usually associated with at least one of atimeslot number of enhanced control channel transmission, an associatedRNTI during the enhanced control channel transmission and a certainparameter specific to a transmission point (such as a transmission pointID), etc. Specifically, the initialization value c_(init) of thescrambling sequence, which is determined according to the transmissionpoint-specific scrambling initialization operation, is└n_(s)/2┘2⁹+N_(ID) ^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI).

Where n_(RNTI) corresponds to the associated RNTI during the enhancedcontrol channel transmission, n_(s) is the timeslot number, and N_(ID)^(cell) is an identification of a cell where the user equipment 400locates, which may be a physical cell ID or a virtual cell ID, thisvirtual cell ID may be a virtual cell ID configured by a higher layersignaling.

Embodiment 25

This embodiment provides a base station, which is used to execute themethod for scrambling sequence configuration in the embodiment 1.

The base station in this embodiment includes: at least one processor anda memory, where the memory is configured to store an executable programcode, and, by reading the executable program code stored in the memoryto run a program corresponding to the executable program code, theprocessor is configured to:

obtain a search space and/or a transmission mode corresponding to anenhanced control channel, where the search space includes a UE-specificsearch space and a common search space, and the transmission modeincludes a localized mode and a distributed mode;

perform a scrambling initialization operation according to the searchspace and/or the transmission mode, and determine an initializationvalue of a scrambling sequence.

The base station of this embodiment determines an initialization valueof a scrambling sequence according to a search space or a transmissionmode, or the base station determines the initialization value of thescrambling sequence according to both the search space and thetransmission mode, which is able to guarantee randomization ofinterferences between different cells or terminals as far as possible,and meanwhile may be used to make a distinction between channels and/orregions where the channels locate.

Embodiment 26

This embodiment provides a user equipment, which is used to execute themethod for scrambling sequence configuration in the embodiment 7.

The user equipment of this embodiment includes: at least one processorand a memory, where the memory is configured to store an executableprogram code, and by reading the executable program code stored in thememory to run a program corresponding to the executable program code,the processor is configured to:

when the user equipment receives a transmission signal transmitted by abase station via an enhanced control channel, obtain a search spaceand/or a transmission mode corresponding to the enhanced controlchannel, where the search space includes a UE-specific search space anda common search space, and the transmission mode includes a localizedmode and a distributed mode;

perform a scrambling initialization operation according to the searchspace and/or the transmission mode, and determine an initializationvalue of a scrambling sequence;

determine the scrambling sequence according to the initialization valueof the scrambling sequence; and

perform a descrambling operation to a scrambling sequence in thetransmission signal according to the scrambling sequence.

The user equipment of this embodiment determines an initialization valueof a scrambling sequence according to a search space or a transmissionmode, or a terminal determines an initialization value of a scramblingsequence according to both the search space and the transmission mode,so as to determine the scrambling sequence and obtain information in thetransmission signal via the scrambling sequence.

Persons of ordinary skill in the art may understand that, all or a partof steps of the foregoing method embodiments may be implemented by aprogram instructing relevant hardware. The foregoing program may bestored in a computer readable storage medium. When the program runs, thesteps of the foregoing method embodiments are executed. The foregoingstorage medium includes various mediums capable of storing programcodes, such as an ROM, an RAM, a magnetic disk, or an optical disc etc.

Finally, it should be noted that the foregoing embodiments are merelyintended for describing technical solutions of the present inventionrather than limiting the present invention. Although the presentinvention is described in detail with reference to the foregoingembodiments, persons of ordinary skill in the art should understand thatthey may still make modifications to the technical solutions describedin the foregoing embodiments, or make equivalent replacements to sometechnical features thereof; however, these modifications or replacementsdo not make the essence of corresponding technical solutions depart fromthe scope of the technical solutions in the embodiments of the presentinvention.

What is claimed is:
 1. A method for scrambling sequence configuration,comprising: obtaining, by a base station, a search space and/or atransmission mode corresponding to an enhanced control channel, whereinthe search space comprises a user equipment specific (UE-specific)search space and a common search space, and the transmission modecomprises a localized mode and a distributed mode; performing, by thebase station, a scrambling initialization operation according to thesearch space and/or the transmission mode, and determining aninitialization value of a scrambling sequence; determining, by the basestation, according to the initialization value of the scramblingsequence, the scrambling sequence; and scrambling, by the base station,according to the scrambling sequence, a transmission signal transmittedby a transmitter utilizing the enhanced control channel and thentransmitting to a user equipment (UE), so that the user equipment whichreceives the transmission signal performs a descrambling operationaccording to the scrambling sequence in the transmission signal.
 2. Themethod for scrambling sequence configuration according to claim 1,wherein the performing of the scrambling initialization operationaccording to the search space and/or the transmission mode comprises theprocessor making a decision of: if the search space is the UE-specificsearch space or the common search space, then performing a transmissionpoint-specific initialization operation.
 3. The method for scramblingsequence configuration according to claim 1, wherein the performing ofthe scrambling initialization operation according to the search spaceand/or the transmission mode comprises the processor making a decisionof: if the transmission mode is the localized mode, then performing aUE-specific scrambling initialization operation.
 4. The method forscrambling sequence configuration according to claim 1, wherein theperforming of the scrambling initialization operation according to thesearch space and/or the transmission mode comprises the processor makinga decision of: if the transmission mode is the distributed mode, thenperforming a transmission point-specific scrambling initializationoperation.
 5. The method for scrambling sequence configuration accordingto claim 2, wherein the determining according to the initializationvalue of a scrambling sequence comprises: determining, according to thetransmission point-specific scrambling initialization operation, theinitialization value of the scrambling sequence as └n_(s)/2┘·2⁹+N_(ID)^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI); wherein n_(RNTI),corresponds to an associated radio network temporary identifier (RNTI)during enhanced control channel transmission, n_(s) is a timeslotnumber, and N_(ID) ^(cell) is a physical cell identity (ID) or a virtualcell ID of a cell where the user equipment locates.
 6. The method forscrambling sequence configuration according to claim 4, wherein thedetermining according to the initialization value of a scramblingsequence comprises: determining, according to the transmissionpoint-specific scrambling initialization operation, the initializationvalue of the scrambling sequence as └n_(s)/2┘·2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI); wherein n_(RNTI) corresponds to an associatedRNTI during enhanced control channel transmission, n_(s) is a timeslotnumber, and N_(ID) ^(cell) is a physical cell ID or a virtual cell ID ofa cell where the user equipment locates.
 7. The method for scramblingsequence configuration according to claim 3, wherein the determiningaccording to the initialization value of a scrambling sequencecomprises: determining, according to the UE-specific scramblinginitialization operation, the initialization value of the scramblingsequence as n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI); wherein n_(RNTI)corresponds to an associated RNTI during enhanced control channeltransmission, n_(s) is a timeslot number, and N_(ID) ^(cell) is aphysical cell ID or a virtual cell ID of a cell where the user equipmentlocates.
 8. The method for scrambling sequence configuration accordingto claim 5, wherein the virtual cell ID is a virtual cell ID ininitialization setting of a demodulation reference signal (DMRS)sequence of the enhanced control channel, or is a virtual cell ID ininitialization setting of a DMRS sequence of a physical downlink sharedchannel, or is other value that is configured by a higher layersignaling and is dedicated for the enhanced control channel.
 9. Themethod for scrambling sequence configuration according to claim 6,wherein the virtual cell ID is a virtual cell ID in initializationsetting of a DMRS sequence of the enhanced control channel, or is avirtual cell ID in initialization setting of a DMRS sequence of aphysical downlink shared channel, or is other value that is configuredby a higher layer signaling and is dedicated for the enhanced controlchannel.
 10. The method for scrambling sequence configuration accordingto claim 7, wherein the virtual cell ID is a virtual cell ID ininitialization setting of a DMRS sequence of the enhanced controlchannel, or is a virtual cell ID in initialization setting of a DMRSsequence of a physical downlink shared channel, or is other value thatis configured by a higher layer signaling and is dedicated for theenhanced control channel.
 11. A base station, comprising at least oneprocessor and a memory, wherein the memory is configured to store anexecutable program code, and the processor, by reading the executableprogram code stored in the memory to run a program corresponding to theexecutable program code, is configured to: obtain a search space and/ora transmission mode corresponding to an enhanced control channel,wherein the search space comprises a user equipment specific(UE-specific) search space and a common search space, and thetransmission mode comprises a localized mode and a distributed mode;perform a scrambling initialization operation according to the searchspace and/or the transmission mode, and determine an initializationvalue of a scrambling sequence; determine, according to theinitialization value of the scrambling sequence, the scramblingsequence; and scramble, according to the scrambling sequence, atransmission signal transmitted by a transmitter, utilizing the enhancedcontrol channel and then transmit to a user equipment (UE), so that theuser equipment which receives the transmission signal performs adescrambling operation according to the scrambling sequence in thetransmission signal.
 12. The base station according to claim 11, whereinthe processor is further configured to: if the search space is theUE-specific search space or the common search space, then perform atransmission point-specific initialization operation.
 13. The basestation according to claim 11, wherein the processor is furtherconfigured to: if the transmission mode is the localized mode, thenperform a UE-specific scrambling initialization operation.
 14. The basestation according to claim 11, wherein the processor is furtherconfigured to: if the transmission mode is the distributed mode, thenperform a transmission point-specific scrambling initializationoperation.
 15. The base station according to claim 12, wherein theprocessor is further configured to: determine, according to thetransmission point-specific scrambling initialization operation, theinitialization value of the scrambling sequence as └n_(s)/2┘·2⁹+N_(ID)^(cell), n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI); wherein n_(RNTI)corresponds to an associated radio network temporary identifier (RNTI)during enhanced control channel transmission, n_(s) is a timeslotnumber, and N_(ID) ^(cell) is a physical cell identity (ID) or a virtualcell ID of a cell where the user equipment locates.
 16. The base stationaccording to claim 14, wherein the processor is further configured to:determine, according to the transmission point-specific scramblinginitialization operation, the initialization value of the scramblingsequence as └n_(s)/2┘·2⁹+N_(ID) ^(cell),n_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI); wherein n_(RNTI) corresponds to an associatedRNTI during enhanced control channel transmission, n_(s) is a timeslotnumber, and N_(ID) ^(cell) is a physical cell ID or a virtual cell ID ofa cell where the user equipment locates.
 17. The base station accordingto claim 13, wherein the processor is further configured to: determine,according to the UE-specific scrambling initialization operation, theinitialization value of the scrambling sequence asn_(RNTI)·2¹⁴+└n_(s)/2┘·2⁹+N_(ID) ^(cell) or (└n_(s)/2┘+1)·(2N_(ID)^(cell)+1)·2¹⁶+n_(RNTI); wherein n_(RNTI) corresponds to an associatedRNTI during enhanced control channel transmission, n_(s) is a timeslotnumber, and N_(ID) ^(cell) is a physical cell ID or a virtual cell ID ofa cell where the user equipment locates.
 18. The base station accordingto claim 15, wherein the virtual cell ID is a virtual cell ID ininitialization setting of a demodulation reference signal (DMRS)sequence of the enhanced control channel, or is a virtual cell ID ininitialization setting of a DMRS sequence of a physical downlink sharedchannel, or is other value that is configured by a higher layersignaling and is dedicated for the enhanced control channel.
 19. Thebase station according to claim 16, wherein the virtual cell ID is avirtual cell ID in initialization setting of a DMRS sequence of theenhanced control channel, or is a virtual cell ID in initializationsetting of a DMRS sequence of a physical downlink shared channel, or isother value that is configured by a higher layer signaling and isdedicated for the enhanced control channel.
 20. The base stationaccording to claim 17, wherein the virtual cell ID is a virtual cell IDin initialization setting of a DMRS sequence of the enhanced controlchannel, or is a virtual cell ID in initialization setting of a DMRSsequence of a physical downlink shared channel, or is other value thatis configured by a higher layer signaling and is dedicated for theenhanced control channel.